Seminar "Error and Disturbance as Irreversibility"

DiSAT is glad to inviting you to the following seminar "Error and Disturbance as Irreversibility" that will be held by Haruki Emori from RiKEN on June the 13th at 11.00 a.m.
Since Heisenberg’s original formulation of the uncertainty principle, the notions of error and disturbance in quantum measurements have played a central role in quantum physics. Yet, as with many foundational concepts in quantum theory, these quantities admit multiple, often disparate definitions. In this talk, we present a unified and versatile framework that redefines error and disturbance as particular manifestations of irreversibility in quantum processes. This perspective allows us to draw deep connections with established results from stochastic thermodynamics and quantum information theory, enriching our understanding of quantum measurement.
To highlight the power of this approach, we present three key outcomes. First, we show that our framework naturally encompasses and unifies a wide range of existing definitions of error and disturbance. Second, we extend the quantitative Wigner–Araki–Yanase (WAY) theorem—a fundamental limit on quantum measurements under conservation laws—to arbitrary definitions of error and disturbance across general quantum processes. Third, we demonstrate that our formulation captures the out-of-time-ordered correlator (OTOC), a well-known diagnostic of quantum chaos, as a special case of irreversibility in the spirit of quantum measurement theory, and we propose a practical method for its experimental evaluation.
Finally, we show that all of these theoretical results are not only conceptually insightful but also experimentally accessible using current quantum computing platforms.

Davide Girolami